Yea, this is something you'd implement in front of your exchange box on a mail gateway. It is actually widely implemented but, as you've found, not on Exchange servers, which is too bad since it's a very effective solution with little side effects.
If you're a smallish shop with the right knowledge (Linux, etc...) you can put this together for next to free on spare hardware. It all depends on management, abilities, and how bad the itch is. > -----Original Message----- > From: John Hornbuckle [mailto:[email protected]] > Sent: Monday, February 23, 2009 15:12 > To: MS-Exchange Admin Issues > Subject: RE: backscatter issue > > Sounds promising, but not widely-implemented (or, apparently, an option > with Exchange without 3rd party software). > > > > John Hornbuckle > MIS Department > Taylor County School District > 318 North Clark Street > Perry, FL 32347 > > www.taylor.k12.fl.us > > > > > -----Original Message----- > From: Jason Gurtz [mailto:[email protected]] > Sent: Friday, February 13, 2009 4:34 PM > To: MS-Exchange Admin Issues > Subject: RE: backscatter issue > > > What I came up with based on feedback from this list and some research > I > > did was that not a heck of a lot can be done about it. > > BATV will take care of this in 99% of cases. > <http://en.wikipedia.org/wiki/Bounce_Address_Tag_Validation> and > <http://mipassoc.org/batv/> explain in detail. > > ~JasonG > > > ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ > ~ http://www.sunbeltsoftware.com/Ninja ~ > > ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ > ~ http://www.sunbeltsoftware.com/Ninja ~ ~ Ninja Email Security with Cloudmark Spam Engine Gets Image Spam ~ ~ http://www.sunbeltsoftware.com/Ninja ~
